Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcfad55e26c6cdb2090f7cb9cb092edeee36f176a0cacd4407cc5647d5a00b82' 
  AND token = 'sdi1ptgDqfMsqsmY5/nxIGkyLYpNTFuf1kHD225Rc98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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