Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdec09a6da122d9d0ed8327adc7173fbf8f2b434361fe61fe54e82c2ce6bb5de' 
  AND token = 'mI3lvmMbF6TEsUvJZHzTb15CPR2EWpt+u0vGBhknc/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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