Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e56d8bd4bbff94e95ef1be4e63a93bba8daab661ce0ec4feb32364ba7e38d18a' 
  AND token = 'OhDRA8pKemorsIBBqpgXo/QCi7kFOfnTAXzFcWSyQqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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