Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '12b3578d3c19bcd862bb0f8c21b07f79a11cc63031990d29ac1cc0fb2ff65fa8' 
  AND token = 'NP7QUoEbsX7hbXv8Nm5ZcLuHAOPDSX5SSHUbmMvfZ8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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