Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43b4c59cee8c892e682676e6419110db6bb7245914312be96f486b662c38b92c' 
  AND token = 'S0u0ikTPqdGpZd39ZT/StVMcEHvxLtj04FOaA02mFb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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