Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed1f652fc3e8705fd639fa5f13b3e6a913705869f5ff652cfc5e1be93dc1a359' 
  AND token = 'DFN7tRZiTgTkK5hrjxTX1n7KUnP0T+9T3HgzrCw85hk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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