SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '989b2259e5f142e2bc21ee0d75e69171132db809cac1b9446b6746547dc9d09d' 
  AND token = 'hxBgm5nNjF8HBV/jJHzBGxhQTVANMH6/6Uc3WjodRI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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