SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b06e0b5878c0e7736773d12dd045f0d01e1f5b62906bdb7ebd735538f142314' 
  AND token = 'zVup/cgjHWpNUaoTfhtzRkGdlPrW89j39+zCEGw8jZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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