Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c55eeed55fd94f0c594c70ba2acfbd3be6ddf4d517ff4ac688ebb9bf7efa2c9' 
  AND token = '2YPDoB2iqAt36viLJAUQp9CoMLLFTa0XQvIL7IvSpRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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