Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f90ea771e7beb6ec6af03391216458f2f14b9c481a8b50d400bfc509b93628a5' 
  AND token = 'VqSCIWrR6oNGU1TUdB/QR67el/IOqzkaeFM/Lam79Q4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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