Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b0f4097c455d9d8d00a89fffcad37b34570d3aec28adf67ec1593e8b87ccd8c' 
  AND token = 'BGx+cF681LjUNtj/UoFx7AwoZ9opo4ewFGuQiv4s10E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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