Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dbe16181205a9dc80a29f55559d83120223ec129c7b4b379d5040d058333efe2' 
  AND token = '9fklOTmvzyId5yvUt3q+IRqymeMfmgRl4f7dcgoDLZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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