Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ace3b815638f8c63f29ec548c7a935061eb1415e8e6aae8f5849ecc62893051' 
  AND token = 'gIJzejlgZ8buhVqBLQyz8Qe7bis1PjaBWPrLt2H0bwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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