Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98002399ddc96a605622cdfd3882f528a89daa49add6862a8e0e2140673193e0' 
  AND token = '/oRE2EqSa9ezCDeYKIuAoQrNgDuynkr/rXrGhv5B6xs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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