Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba8a569cb353ef99d92d73d0f0fe43274650f21a77bd4b147622d944fd02d8e5' 
  AND token = 'QGyMs8zeGTtEhLpyqxPQ2k7PAqmVFzvuKneQddV4S60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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