Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ea13f2b94279486977150ac3705e8271f88896fcd10fd20c09aaf83d3b3429b' 
  AND token = 'D7+FJip367w/z0p80YNRSXRxXj8SC2zhdzfEJrH7+AQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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