Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0ed807ffa97f7b20b3c159922480c002575a5b6591928553ae2d4d01696a090' 
  AND token = 'uepdbcACcoQAjM2wqb+aGzzImmnpwxHjtdGRWlJitAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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