Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8dc547eb3fb4331fd8a9426946ce9b3b4dc182cedcc59de79cfaec2b70adbef7' 
  AND token = 's1aHgbk5YAbXjv0i8hCPUcXOuYLm+7VadCs1ElhdOpQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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