Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e113eba2b5f8e29abb4d3d6160fd6b3bd04a88b409e6cf1db647010a9e68bc3f' 
  AND token = 'DyCZbM4oKq+VM1qpnWOexfuhAPj+IrDZ7k55yPaDY5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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