Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31b89bbc71f5cafd8a988ca6ec67d5a29d4a83b61d20f5e25d1ebed3be928c99' 
  AND token = 'IEIFPE4k4zMmPBKbt307H1wzJHR1+74aTAkBwQyvEzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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