Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '652a6ecad43fc27865157504ac5030cb1c7c2e1e2cc87e1e075758019c7cb145' 
  AND token = 'cNxay5cTkJdIsFlGVBti8eJyxi4j04t+GAQCGa7p3FE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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