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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02262a5f47c7e6143f6ae1f81b2f0566268f702f192d9049a6ed88d786053404' 
  AND token = 'RizAMCwd4uFtZaOehurfZBA8rFl0k4eUWbTrBwO6laE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}