SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46825755c2755497fb830052a677bcdc46d961c6e8b56d384f6958dca421d611' 
  AND token = 'oFp+YXJXe5SDP0E/vxOlZYU6zMe89Chpj0tfZVcOg8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}