Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3ef570b42379fa7519c0c721abdd98fe0f45df5667ccc918d5d77636967e46b1' 
  AND token = 'jfxAlt8fyabRbLdrVTYDP+rIFy5c/j/aPoivLct81Hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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