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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd40e36c77145b7f5b79227fa431bccae1942151760bb9557f4165c4fc68f64cf' 
  AND token = 'wIw71OO44/iD8UF3UzBEdSqN4+MJoPSkh/ioG0lzf0Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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