Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58345a0b978972890c609c8c4d11515c6993746c5e6bf93c04c6409552c38505' 
  AND token = 'KQ/cyYstYQ7+1oXZcO1LhO6Rd+4G9STg3SkFZh5LKo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}