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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e07ff49382ae80e62a0b6aeea6b5f62be86314810620741862d6bcc02c743d90' 
  AND token = 'bwz8xQf1E2gwU2UOGPUR6Z09V9cXuCHZESbh1Cfoi+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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