Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '794f0219f54828d78da02a03bd9bdf6d05877c552d065235df527c4ddc5548a4' 
  AND token = 'ool6CqR5ujqNEvCGHRpnEJrqsDnjRVFkU0TFal+lZ/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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