SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b1a109d0ce5ff6b2a529ca027db39cc3880ff08813da66339c1461f3e425737' 
  AND token = 'SYz7hhBiFCqUxw2o9IsvC1Ln1ORL4VMrPwnszMbh6+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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