Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f06aa81286b27e93a82eb7d337c365ae3d7977d2ced1235c1afaf10e6634d0f' 
  AND token = '2jkgPU7ugflAJtBak88Ebej0V0nA+cZgnZ5KRFEy+YQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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