Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72dd226cf356b809f2def816f75761f895f25bdbb63ea62d7f7e4c94d65804f9' 
  AND token = 'iI5HbRB7cBkAOlwiHTi/eKqQgLeHpKHTtGLrZcEXmuc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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