Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e2f271e55e26565cf5c8386222ad0fb971003bfde2072a6dad0bcf42a5f3337' 
  AND token = 'e0Q00OvEkx6TxZdgqlyjEbb61HQrsbZoOHo6RDSPf7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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