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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95a475bcbdfa2c802ae70b05ba76cc445fb7aa22fcc2389f05ba51dad3a4d441' 
  AND token = 'Cala0HD+R40Kpc8gk5SRUHF3messkCkhne0v97YeqLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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