SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69006089a0fba3d5e65340b46967a42ce69e41e1f65fe10afc452cbec4e51df8' 
  AND token = 'q1tkbjwFbV6f3iOmc6L7bkjg9BHHH/uXba6mwADUCsU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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