Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b8e354c3b0e8bf1473104b244ba13c07a0908ea60ede981286113c55792d8d1' 
  AND token = 'uLmvJoCJFPQFXJII6Xqer0WSXpGl6kzqUNc2FT+3/qM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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