Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ca86825c59a31b35bbc8b76b51fc55a3c93f5d9fa842373282f1221d72d8ef5' 
  AND token = 'hqH7qYBUmCZliq5a1LaGwNDlSDkZwQ3VgJ3u5cneP3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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