Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a8ad53a5d3aa34b467f3730510d261dae600058e1726ed52c46809847f7d2d0' 
  AND token = 'YAt5yS8ngGTK4CU8gQp5G4tVD1Jlc9Gc6bcKWgsCyAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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