Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b02d8007cd1001c827372fbdcaeafb479bc98589dfaeee8479d3d34239a15e2' 
  AND token = '1Gdb3GYcWB4b2UvFw3paUrMDqjJiIltjPppLvvlbtj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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