Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c881c17341c17578c9676efc6bc6d0cbeb79b5681f1eaddb6ce2edb0bc970634' 
  AND token = 'q2/Fh8NRZ3TtugyziUx/BfntypKL7dZYjaSpvRhLxfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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