Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eeaa164e805595660812bc29a250153008ac8cb64afd1afe94626fa9b820840a' 
  AND token = 'w1n3j67sT4pystP11GRU3wpcaQc935p7+zFxhoyvsUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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