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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de3bc8287908215b16b91ac61f378fe52091c013c5ea9586514e7abd48f89098' 
  AND token = 'IrYT+0nejcD31910lIxB0vsO8n0CTkRSnELz8VD+NrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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