SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b205d8483a7592f6215f2acc4987798115b11cf9f6d8baeea3313e32740b4bf6' 
  AND token = '3Iq5IfuaDZRF46UZO6RzGkxfuqHZGX0KF1Sgn9PL9ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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