Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1aca13798e2e36be3b07b9503a94812bf54fabaa3aba2826155f489cf3bc5fb' 
  AND token = 'kUYyOmIsUolzno80uwI73kHlFPs5ye3sWeHI9reuHoA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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