Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4bdfc6d301b414bc72223c75fb6be85766ff53f091b365a8e68dd37e1cfb9ad' 
  AND token = '4gXrN3VQfqE5qf/mCQRS33Eq6g9Hft/bMfUlUFGQtdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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