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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50b6b433cb14087d1b01c56ed5776d1d972123a8e353dc444b084c7be96d7818' 
  AND token = 'XpCqWv5bbkOlRC/Wxln1WjGOLzXxudrQyb4iA9YEqOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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