Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb3f7ad4a8049078039c7b3d8d956685169f14a2fba683df0fa8d22304dffd87' 
  AND token = '5p4ViUcm6FE5fi5selSlGNnaE2VEbYgcZOk6e9anofI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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