Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b2c59a611c0cb8244ddf6feb0d760dc4e4fe3e78566ecd97e5e231231fc6ad0f' 
  AND token = 'ujNegJxTEK3z6csxwzammA2CdyvnKE4grIL3ILPO0Lw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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