Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67010a8d1fbb10d36fe9d4d4ccb34d622494cfdb42862266045356902f9599f7' 
  AND token = 'gBr/3pol8bJ1tNBFgI66aVqObsYf7A3dEBfPHogjgX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}