Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f3468593b74c412e5177972efa3a6407165b6a08feebd37efdb998161ad790a' 
  AND token = '4m2HAOrgXWjedP5WQH3yacbJhVSQzdXZopJslFmADSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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