Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28c862361bcd5f21292448a76b28b19ff82ac59e0acc7561da7e6e31234acf92' 
  AND token = 'UXORApPBRJspfqgO6bzknAiM/tzj7+8kIp8Lk+6GPPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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