Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '471135a6ac0db81734b2d1eba439745bdf09f32d9eb6c9e2d34da822c484a6d1' 
  AND token = 'ibcG0XGPK8Liv+smluHPWj1EyFFpF1WPGP9mrHjl65M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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