Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db5d179b91424d58c4fd057f6d3f26ed294dcc6fb0d195e7b0aec90903ff13ab' 
  AND token = '8JLmfTShNV6MkidVxFewxd+VihzBtCAiRapnzRupKGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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