Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00d46dd5421ccf11efa27404fd49e419534f4b8e7b662de3bd27a24929b08357' 
  AND token = 'epgLKLEbfgPbM0Et/W8p5MKnXiwxaR23tK4jJ9HDEas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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