Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ca6a15dc8baca7ebaec83c5f20caf36c0cef3aac5fa396afff15fef3daa91cb' 
  AND token = 'ciMMK0JEwreFpp+jwQ8PxvhO67wXqHeb8r2s6Ck4s00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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