Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '806123ef0b907d80ac7a517c75b9678ff55fe8a00f2c2006f8e8b3c9d97e70e5' 
  AND token = 'j7wB79cpfZfyzBsxr7TT0MkfQOWtc4HdpV1VElyFCik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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