Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab698de5688775b3d60b788aaf2a07bbf35bdda42b13e0855a7aa364ffb76ced' 
  AND token = 'stbIQYi29p9HlnMcK6i9EsRZ3TkNGEpLCCaYHYUunzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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