Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '730e5805f1e4196bbbfcfc635b02207fdee25102ff0a08a538ce678ceb1ddf65' 
  AND token = 'y6w1JqxJ3ckIYd7a9padtxJ//kzd2fSTBlTKPf2pMn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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