Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8db5553950765527194696dd83aa1eb946df0bc73219afe68f1a501b66b2563a' 
  AND token = 'lrnYU3uF4BXbJgmC8rGrIHZxt+xb0n/WIZ388cLdv+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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