Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '401ed47493296172dae3e6c4b665ee7da682eed8c2d05260a47b878ee2371c84' 
  AND token = 'Jx9jyJN3ciMZUddB2O85nMUPQwDZ2mp93PIJQ5pJsUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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