Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39eb06040e657a333f3e23c55dc28675aaf035960a7fda2be7f1921190a666f6' 
  AND token = 'Rep3swdtV1HS+yDWZ+5ebHJF06dI7CApXn3cjwszLEY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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