Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b79367688ec99d4f539dae01fb8a4f2d1af8fa6325c67d0f02ddaf28d3f6a55' 
  AND token = 'I2McFAA6zTWJRXG0jJH/jvfasGiI7qfkWwgdwnCcyEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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