Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cea5d96724380f63cb18b74b42755e682b1a62e31d2b4d9838a8a76343648242' 
  AND token = 'U95l2NxWTcfmjX/dQtyEyNeGYqsG/6M8jN+604yridY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}