Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '043745434d4423fd2f3de64c115c84d8e031760ec74186fce162b208a647f53e' 
  AND token = '99afH/XB54M+baes+Dtvfeo4iLzSaJvDkjlp8EcnJqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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