Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96b85e210d5c0b5e936ef4bb03da40f205c8f8be0603f9e119d5aa5a34a2cc79' 
  AND token = 'R7zPDNWI8xuCd66BfkW/pnzdlbCA1VRk610/D1s0Bz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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