Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '904b9c9a69d1e0ae967ab603d1ff3b1a41031c87c3b3757685b6f9bd641f23c6' 
  AND token = '7pjR7NmCUS4zkzEqpYTQ0sam7a+F/W6gPhetaKhOY1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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