Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed8238ce7cc76859582597bef4c82b2f8e43bec6d25585241a1050abf7759907' 
  AND token = 'OV+c6fYkdSUl1ZTw6FqHPK1aQqHr7TtTVzsKLtIR0k8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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