Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90f933c96000b71b35426fdf48f217aaaef7fdf176957306aef3333cd39e27d0' 
  AND token = 'Bkr2kYCbTq8D39VnsBFV5LVQtu4LMpoCRjkEez3P34g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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