Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd78adb8e8857c0cb3903d1b2af03efc2f9b155c05374674b405f57e915d4914' 
  AND token = 'E7bsvAbe+Ejdtuh3+mPzR1U4JK3BhY7kbJKf/+8UkLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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