Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99923e4c3dd9d05cc6adcc7b88362693b29784e99fc56fb4cda3fae1ef782acd' 
  AND token = 't1RSicfqQA3j8SniTPbZcKie3WvKNEnDOUm/FiyiBDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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