Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e60c7abe1262f05c27040608ba51bfc8ede6c864877634db808753e9b48dc6f' 
  AND token = 'd9u0Ab7xzr6I1VGva+WWUxjmdeoPLB1x8FxhB2+e37U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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