Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6811db96d71fa86f803113e176a725e38fd69f4e8094ce02869cd4a76ca4175e' 
  AND token = 'a0xx/QFj1mb6eHCsTeUEgY90zoyWc43asvcC0bi1DP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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