Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '193e3ec325844f5b8d4d61785f6fe7437e34d66027e07bd6b4245ba01ff3d29b' 
  AND token = '+pKMrEmMA8IDlJ6SBpLFNwb5SeMvM3snnpxm075+Od0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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