Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb862d8cde1e61915cba3644bbeb5e50d66370665b93255d56457c4e6682cc75' 
  AND token = 'VBXJIwJeAKX5eL4nMNbrTrjKE18I9kYP03oEkkrwQbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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