Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79b3029d5534d4e79076f5d14245d100717b1731518124b9513bc11dd366d635' 
  AND token = 'zRXvT/ErIQyKymvKudVytABk7S0Uirwz7oHhA8BI7Ho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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