Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c6f07dca29b66f7a87e45e0e8c697eec8c764a6760d6a834629a8159f94b2de' 
  AND token = 'cwOn0SJwXFYZLwMxk0nbqfXOPtU0jFEO8uV7LR53DBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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