Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5404d8969514e1726727d3b585f0044617f1aac7ab4f7a8677a809e40644ed6f' 
  AND token = 'XX1er9bvs19rVsPCPhR2WmeAHlOrnfegAyDcKb/Cw6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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