Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b77363ad9e208c323fc6a1f7cae573d8084d8a60a2ebc72bb78d8850e03535c' 
  AND token = 'G38QC6mstkmMfkNIjWtvKqqOrG3/CYyvSGvvVZUTJi0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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