Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9687a1ac47235328871cdc34bfee426e48ae4c38afae74e4ab448fe0f46b5e0d' 
  AND token = 'RQfFD1UCbQaezMJ9rhlRgO8vFdznNR4aqXsgriOJkwo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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