Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '581779360d4e4a17a1ea5d42551de9a6f15c739792323508683b3ae6eba1d2b0' 
  AND token = 'Ik9rm/PXcYQH49558ccuTb5eZgHhxFiD/nd/Z5/KGyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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