Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f825e52e02bb896ed7ef49ad932184ff9f0399178e8ce96e9b8751549beedd60' 
  AND token = 'K1lnxJzmog6U5yFcKQ//7Y8bULqS8bGzEON543atpFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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