Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27b617bc1917790261a70ec9682075f0b169f6941e1291b520351934e952176d' 
  AND token = 'F1150JAi0i7ABcomn+u6gh2vOKbaNd+HI0UjRSjicnQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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