Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bae90926d56dc7b1c314c185fbe7edc42cfb7e7b75004bb716ddb43bd34e073' 
  AND token = 'uN9XzG/pELbSnSVoV4MeUEwJ9xPXUZXvI2uKNqianaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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