Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c82acc64738c31daeeaf44d0b1cb73962354f149491110a65c223b8fa73b2c2a' 
  AND token = 'xy/ryMRODcZuf+CgeZC2i3A+Vj5+VZBSQRCdF/l0iXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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