Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cc7449ab0918ae8e9dcbd2592900cf9c5cd28cee9476cd025dd055bd1b7ba60' 
  AND token = 'Z0Og7ELnti6ZI6b9espZpU7tnSEm5E/JMRZwINoX8BY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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