Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc3373f419e4acab4076ef7d0c4c446e028ce7577e1e19440712d16218862cba' 
  AND token = 'DtVWzKxHnweQwn82tbmLeTtu05LDZ9LCx2yphEuA2dI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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