Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c10b8cb09f7e6fbe0e200b0a4f5e4ba825613c31e58eed18ab19532ec6f22c09' 
  AND token = 'NVa3SO4ekXaLiaA+w1DCli67wfL4Eojj3BI3FiORZ9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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