Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48ee7c3f42653c150c62acdc455aeaa7c1fcd4f0d4680c81c981e92abc4361c0' 
  AND token = 'RVfahOD6fsTOc2SLqOZzYcgUTMl4915Z5k+oBFHz3Yw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}