Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a2005d263fdcf8575b3347cf110c64b4fb647bb31986a17bd1b84fd8f95b040' 
  AND token = 'BBDupcVJ4/BALgb4gZefD4C2gcQKcINfs5JN295zaL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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