Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '465d2ad3355313494d75fd374194c0c201f539927cedd78d4007bf5f5e9e6d4d' 
  AND token = 'J/TW70WgM+lqdprUzN30NdnliSbtlAJD2CiB1XPvjc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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