Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0cb9e690d742c5854aff1952ba3b1b3b6b44a336aa6424bb51c30c81aba451c' 
  AND token = 'pXKrBCk0YEWw3XO6xQb5YSuKyjUVXCV0fs8YVVPxvpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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