Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ffb538253ea4325c09f0b9d9ef3337c26dde85b4e242444225ebca0df9edac4' 
  AND token = 'bmFf/Qyd67z6rh+WHmVxv7ePBUSn3mnaDM1XvdJN3uc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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