Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18d2bc0f3f62c0d766096a20730ddbd211b119700600aa9e50726834bfa5e57f' 
  AND token = 'z5xKD+msd3AAYREdN7QHVxJcusu39nf+kRrMyS0Vq1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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