SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd06d9d955d07a2b21df880d3cb25425de00cf16f3097a4f41e36a4cc5fbf836e' 
  AND token = 'SWeaYG1Xk+briDvHXOM9NZ/KK6+foIqHJ6pgUZ1QIuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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