Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d2ac0c886aba63a20dc70a62c962986e41445f0c3afc59a65e18cb7f433c7ff' 
  AND token = '1bP39Smg4arIDa2QFcLS38WAkUsgPqHGZN7lbRlbBUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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