Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '041317c2551264af9157aa39fc95e2cc1875a5df8cccb0b079d67debb19ffe3c' 
  AND token = 'pGx3v7z90FQqCXk4ApfmOAsbbd+YpPMEy2UIRf0f6jM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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