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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63effc2548e5715bd8ad3540895ca4144c494bfae9d9a5ff33e03d2819362dae' 
  AND token = 'bMpMyF8QzZmZs3CIcegVv3y1mtFVo9tM5E7Sg0yIyl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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