Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bedcaeb7b5c3b7558fb579398c90c455afb3248ac037ea8423f4c8351f0a6b4' 
  AND token = 'GC6z1/mKJ5Af2QbmMXzXB3kWNKhbyA2j/u4RZtUSQkk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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