Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '525c96710dfc0aec294c6f43a31d3d076199e25fbdec39f24315a33c8d509e93' 
  AND token = '9dVnqFEiqyXcsD+rsf80zaoiAa24UMXvEYwLvR6deOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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