Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21004e4535892b27fdad6e5adc19558d7e59433e1c69c8e529daf3392a060302' 
  AND token = 'befxYG2YLXIY+kkkH2SFD7A3kVclVOfjmgb8GZ1X3q8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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